/*
 * Copyright 2007 National Bioinformatics Network
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package dgbgui.command;

import dgbgui.DGBGUI;
import dgbgui.gui.MainFrame;

public class ChangePerspectiveCommand implements Command {

    public ChangePerspectiveCommand(MainFrame.Perspective perspective) {
        m_newPerspective = perspective;
        m_oldPerspective = DGBGUI.getInstance().getMainFrame().getPerspective();
    }
    
    public void execute() {
        DGBGUI.getInstance().getMainFrame().setPerspective(m_newPerspective);
    }

    public void redo() {
        DGBGUI.getInstance().getMainFrame().setPerspective(m_newPerspective);
    }

    public void undo() {
        DGBGUI.getInstance().getMainFrame().setPerspective(m_oldPerspective);
    }
    
    public boolean isUndoable() {
        return true;
    }


    private MainFrame.Perspective m_oldPerspective;
    private MainFrame.Perspective m_newPerspective;

}
